ftp_parser.c

功能强大的ftp服务器源代码

            }
            goto wayout;
        } else if (!strcmp(cmd, "pbsz")) {
            addreply_noformat(tls_cnx == NULL ? 503 : 200, "PBSZ=0");
        } else if (!strcmp(cmd, "prot")) {
            if (tls_cnx == NULL) {
                addreply_noformat(503, "PBSZ?");
                goto wayout;
            }
            switch (*arg) {
            case 0:
                addreply_noformat(503, MSG_MISSING_ARG);
                break;
            case 'C':
                if (arg[1] == 0) {
                    addreply_noformat(200, "OK");
                    break;
                }
            default:
                addreply_noformat(534, "Fallback to [C]");
                break;
            }
#endif
        } else if (!strcmp(cmd, "auth") || !strcmp(cmd, "adat")) {
            addreply_noformat(500, MSG_AUTH_UNIMPLEMENTED);
        } else if (!strcmp(cmd, "type")) {
            antiidle();
            dotype(arg);
            goto wayout;
        } else if (!strcmp(cmd, "mode")) {
            antiidle();                
            domode(arg);
            goto wayout;
#ifndef MINIMAL
        } else if (!strcmp(cmd, "feat")) {
            dofeat();
            goto wayout;
#endif
        } else if (!strcmp(cmd, "stru")) {
            dostru(arg);
            goto wayout;
#ifndef MINIMAL
        } else if (!strcmp(cmd, "help")) {
            goto help_site;
#endif
#ifdef DEBUG
        } else if (!strcmp(cmd, "xdbg")) {
            debug++;
            addreply(200, MSG_XDBG_OK, debug);
            goto wayout;
#endif            
        } else if (loggedin == 0) {            
            /* from this point, all commands need authentication */
            addreply_noformat(530, MSG_NOT_LOGGED_IN);
            goto wayout;
        } else {
            if (!strcmp(cmd, "cwd") || !strcmp(cmd, "xcwd")) {
                antiidle();
                docwd(arg);
                goto wayout;
            } else if (!strcmp(cmd, "port")) {
                doport(arg);
#ifndef MINIMAL
            } else if (!strcmp(cmd, "eprt")) {
                doeprt(arg);
	    } else if (!strcmp(cmd, "esta") &&
		       disallow_passive == 0 &&
		       STORAGE_FAMILY(force_passive_ip) == 0) {
		doesta();
	    } else if (!strcmp(cmd, "estp")) {
		doestp();
#endif
            } else if (disallow_passive == 0 && 
                       (!strcmp(cmd, "pasv") || !strcmp(cmd, "p@sw"))) {
                dopasv(0);
            } else if (disallow_passive == 0 && 
                       (!strcmp(cmd, "epsv") && 
                       (broken_client_compat == 0 ||
                        STORAGE_FAMILY(ctrlconn) == AF_INET6))) {
                if (!strcasecmp(arg, "all")) {
                    epsv_all = 1;
                    addreply_noformat(220, MSG_ACTIVE_DISABLED);
                } else if (!strcmp(arg, "2") && !v6ready) {
                    addreply_noformat(522, MSG_ONLY_IPV4);
                } else {
                    dopasv(1);
                }
#ifndef MINIMAL            
            } else if (disallow_passive == 0 && !strcmp(cmd, "spsv")) {
                dopasv(2);
#endif
            } else if (!strcmp(cmd, "pwd") || !strcmp(cmd, "xpwd")) {
                antiidle();
                addreply(257, "\"%s\" " MSG_IS_YOUR_CURRENT_LOCATION, wd);
                goto wayout;                
            } else if (!strcmp(cmd, "cdup") || !strcmp(cmd, "xcup")) {
                docwd("..");
            } else if (!strcmp(cmd, "retr")) {
                if (*arg != 0) {
                    doretr(arg);
                } else {
                    addreply_noformat(501, MSG_NO_FILE_NAME);
                }
            } else if (!strcmp(cmd, "rest")) {
                antiidle();
                if (*arg != 0) {
                    dorest(arg);
                } else {
                    addreply_noformat(501, MSG_NO_RESTART_POINT);
                    restartat = (off_t) 0;
                }
                goto wayout;
            } else if (!strcmp(cmd, "dele")) {
                if (*arg != 0) {
                    dodele(arg);
                } else {
                    addreply_noformat(501, MSG_NO_FILE_NAME);
                }
            } else if (!strcmp(cmd, "stor")) {
                arg = revealextraspc(arg);
                if (*arg != 0) {
                    dostor(arg, 0, autorename);
                } else {
                    addreply_noformat(501, MSG_NO_FILE_NAME);
                }
            } else if (!strcmp(cmd, "appe")) {
                arg = revealextraspc(arg);
                if (*arg != 0) {
                    dostor(arg, 1, 0);
                } else {
                    addreply_noformat(501, MSG_NO_FILE_NAME);
                }
#ifndef MINIMAL
            } else if (!strcmp(cmd, "stou")) {
                dostou();
#endif
#ifndef DISABLE_MKD_RMD
            } else if (!strcmp(cmd, "mkd") || !strcmp(cmd, "xmkd")) {
                arg = revealextraspc(arg);
                if (*arg != 0) {
                    domkd(arg);
                } else {
                    addreply_noformat(501, MSG_NO_DIRECTORY_NAME);
                }
            } else if (!strcmp(cmd, "rmd") || !strcmp(cmd, "xrmd")) {
                if (*arg != 0) {
                    dormd(arg);
                } else {
                    addreply_noformat(550, MSG_NO_DIRECTORY_NAME);
                }
#endif
#ifndef MINIMAL
            } else if (!strcmp(cmd, "stat")) {
                if (*arg != 0) {
# ifdef WITH_TLS
                    if (tls_cnx != NULL) {
                        addreply_noformat(500, MSG_UNKNOWN_COMMAND);
                    } else
# endif
                    {
                        modern_listings = 0;
                        donlist(arg, 1, 1, 1);
                    }
                } else {
                    addreply_noformat(211, "http://www.pureftpd.org/");
                }
#endif
            } else if (!strcmp(cmd, "list")) {
#ifndef MINIMAL
                modern_listings = 0;
#endif
                donlist(arg, 0, 1, 1);
            } else if (!strcmp(cmd, "nlst")) {
#ifndef MINIMAL                
                modern_listings = 0;
#endif
                donlist(arg, 0, 0, broken_client_compat);
#ifndef MINIMAL
            } else if (!strcmp(cmd, "mlst")) {
                domlst(*arg != 0 ? arg : ".");
            } else if (!strcmp(cmd, "mlsd")) {
                modern_listings = 1;
                donlist(arg, 0, 1, 0);
#endif
            } else if (!strcmp(cmd, "abor")) {
                addreply_noformat(226, MSG_ABOR_SUCCESS);
#ifndef MINIMAL
            } else if (!strcmp(cmd, "site")) {
                if ((sitearg = arg) != NULL) {
                    while (*sitearg != 0 && !isspace((unsigned char) *sitearg)) {
                        sitearg++;
                    }
                    if (*sitearg != 0) {
                        *sitearg++ = 0;
                    }
                }
                if (!strcasecmp(arg, "idle")) {
                    if (sitearg == NULL || *sitearg == 0) {
                        addreply_noformat(501, "SITE IDLE: " MSG_MISSING_ARG);
                    } else {
                        unsigned long int i = 0;

                        i = strtoul(sitearg, &sitearg, 10);
                        if (sitearg && *sitearg)
                            addreply(501, MSG_GARBAGE_FOUND " : %s", sitearg);
                        else if (i > MAX_SITE_IDLE)
                            addreply_noformat(501, MSG_VALUE_TOO_LARGE);
                        else {
                            idletime = i;
                            addreply(200, MSG_IDLE_TIME, idletime);
                            idletime_noop = (double) idletime * 2.0;
                        }
                    }
                } else if (!strcasecmp(arg, "time")) {
                    dositetime();
                } else if (!strcasecmp(arg, "help")) {
                    help_site:
                    
                    addreply_noformat(214, MSG_SITE_HELP CRLF
# ifdef WITH_DIRALIASES
                                      " ALIAS" CRLF
# endif
                                      " CHMOD" CRLF " IDLE");
                    addreply_noformat(214, "Pure-FTPd - http://pureftpd.org/");
                } else if (!strcasecmp(arg, "chmod")) {
                    char *sitearg2;
                    mode_t mode;
                    
                    parsechmod:
                    if (sitearg == NULL || *sitearg == 0) {
                        addreply_noformat(501, "SITE CHMOD: " MSG_MISSING_ARG);
                        goto chmod_wayout;
                    }
                    sitearg2 = sitearg;
                    while (*sitearg2 != 0 && !isspace((unsigned char) *sitearg2)) {
                        sitearg2++;
                    }                    
                    while (*sitearg2 != 0 && isspace((unsigned char) *sitearg2)) {
                        sitearg2++;
                    }                    
                    if (*sitearg2 == 0) {
                        addreply_noformat(550, "SITE CHMOD: " MSG_NO_FILE_NAME);
                        goto chmod_wayout;
                    }
                    mode = (mode_t) strtoul(sitearg, NULL, 8);
                    if (mode > (mode_t) 07777) {
                        addreply_noformat(501, "SITE CHMOD: " MSG_BAD_CHMOD);
                        goto chmod_wayout;
                    }
                    dochmod(sitearg2, mode);
                  chmod_wayout:
                    (void) 0;
# ifdef WITH_DIRALIASES
                } else if (!strcasecmp(arg, "alias")) {
                    if (sitearg == NULL || *sitearg == 0) {
                        print_aliases();
                    } else {
                        register const char *alias;
                        
                        if ((alias = lookup_alias(sitearg)) != NULL) {
                            addreply(214, MSG_ALIASES_ALIAS, sitearg, alias);
                        } else {
                            addreply(502, MSG_ALIASES_UNKNOWN, sitearg);
                        }
                    }
# endif
                } else if (*arg != 0) {
                    addreply(500, "SITE %s " MSG_UNKNOWN_EXTENSION, arg);
                } else {
                    addreply_noformat(500, "SITE: " MSG_MISSING_ARG);
                }
#endif
            } else if (!strcmp(cmd, "mdtm")) {
                domdtm(arg);
            } else if (!strcmp(cmd, "size")) {
                dosize(arg);
#ifndef MINIMAL
            } else if (!strcmp(cmd, "chmod")) {
                sitearg = arg;
                goto parsechmod;
#endif
            } else if (!strcmp(cmd, "rnfr")) {
                if (*arg != 0) {
                    dornfr(arg);
                } else {
                    addreply_noformat(550, MSG_NO_FILE_NAME);
                }
            } else if (!strcmp(cmd, "rnto")) {
                arg = revealextraspc(arg);
                if (*arg != 0) {
                    dornto(arg);
                } else {
                    addreply_noformat(550, MSG_NO_FILE_NAME);
                }
            } else {
                addreply_noformat(500, MSG_UNKNOWN_COMMAND);
            }
        }
        noopidle = (time_t) -1;
      wayout:
#ifdef THROTTLING
        if (throttling_delay != 0UL) {
            usleep2(throttling_delay);
        }
#else
        (void) 0;
#endif
    }
}